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Posted 20 hours ago

OZCO 51717 Ironwood 2-inch Rafter Clips, (10 per Pack), Black

£15.545£31.09Clearance
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About this deal

To reduce the risk of freezing and condensation on pipework, the following precautions should be taken:

A truss clip should always be fitted vertically to a wall plate, never lying flat or horizontally. You must make use of every hole on the face of the roof truss clip, and nail all of these in. Some installers may only use four of the thirteen holes which are on the clip – this is not utilising the strength of the clip fully. Notes for specifiers and builders. The advice provided by trussed rafters manufacturers should be carefully adhered to and bracing in non standard situations should be applied. Sin No 4 Overloading / under loading Batten ends should be cut square and nails skew driven on each side of the joint. Not more than one batten in four should be joined over any one truss or rafter. Most often, roof truss clips are included in your overall quote. However, should you need to buy these, you would be looking at a cost of around 25-40p per clip – a very minimal cost. This is a small price to pay to ensure your designs are validated and safe. All abutments should be weatherproofed using non-ferrous metal flashings. Lead flashings should be at least Code 4 (colour coded blue), while soakers are normally Code 3 (colour coded green). Normally, lead flashings should not exceed 1.5m in length, with laps of not less than 100mm.

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To prevent the underlay sagging at the eaves and forming a water trap behind the fascia, it is recommended that the underlay is supported by a continuous fillet. Where the pitch is below 30°, a continuous fillet should always be used. Plain tiles are unsuitable for pitches less than 35°. (b) verges At valleys, a similar strip should be laid under the main roof underlay and held down by the valley battens, where used. The main roof underlay should be dressed over the valley battens. Celotex insulation fixings are a perfect solution when installing rigid insulation boards in between timbers.

The pitch of a valley is less than the pitch of the main roof. Where tiles are to be used for valleys, the valley pitch should be not less than the minimum permissible pitch given in Table 1 of Appendix 7.2-B. Trusses are made by some forty four manufacturing companies dotted around the country. Trusses are engineered to suit the particular application requested. The software used by each manufacturer will be supplied by one of three companies who also make the connector plates used to fasten the members together (often referred to as “the system owners”). The major System Owners are In roofs with plain tiles, purpose-made valley coursing tiles should be used. Adjacent roof tiles should be cut neatly to form a smooth junction, preferably cutting from tile-and-a-half tiles.If a roof is not a simple triangle, all members should be fully supported and tied together. If necessary, temporary support to long span members should be used until the framing is complete. (c) valley and hip construction Trussed rafters should be evenly spaced and vertical. Temporary bracing should be provided to control the spacing and keep trusses vertical. Angle ties should be used on hipped roof corners to prevent the wall plates spreading. For heavily loaded hip rafters, eg where they are carrying purlins, dragon ties or similar bracing should be used to prevent hip rafter spread. Notes for surveyors / building control officers. Properties built during the 1960s and 1970s frequently do not have diagonal bracing and all of the necessary longitudinal bracing. Even if the roof shows no signs of any deformation it is important that such bracing is added retrospectively.

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